ci: fix direct-minimal-versions

Author: morrisonlevi

Cargo.toml

@@ -43,7 +43,7 @@ doc-comment = "0.3.1"
 bumpalo = { version = "3.13.0", features = ["allocator-api2"] }
 
 [target.'cfg(unix)'.dev-dependencies]
-libc = "0.2"
+libc = "0.2.155"
 
 [features]
 default = ["default-hasher", "inline-more", "allocator-api2", "equivalent", "raw-entry"]